Lannon Lake
Big Stone County, Minnesota - DNR stocking history, depth and survey data
Minnesota · Minnesota Department of Natural Resources (DNR) · DOW 06013900
DNR records show 9 stocking entries at Lannon Lake since 2016, most recently walleye fry in 2025 (100,000 fish).
- Lannon Lake has 9 DNR stocking records across 9 years (2016-2025): walleye (9).
- The most-stocked species by count is walleye: 900,592 fish on record.
- Maximum depth 4 ft; surface area 197 acres, 197 littoral acres, 3.9 miles of shoreline, per the DNR lake survey.
- Average water clarity (Secchi depth) 1.0 ft.
- Fish species DNR lists here: bigmouth buffalo, black bullhead, black crappie, common carp, freshwater drum, northern pike, orangespotted sunfish, quillback, walleye, white crappie, white sucker, yellow bullhead, and 1 more.
- 1 public access on the DNR list.
- Most recent DNR fish survey: (standard survey).
- Big Stone County, nearest town Graceville; DNR lake number (DOW) 06013900.
Stocking history
| Year | Species | Size | Number | Pounds |
|---|---|---|---|---|
| 2025 | Walleye | fry | 100,000 | 1.0 |
| 2024 | Walleye | fry | 100,000 | 0.9 |
| 2023 | Walleye | fry | 100,000 | 0.8 |
| 2022 | Walleye | fry | 100,000 | 0.9 |
| 2021 | Walleye | fry | 100,000 | 0.8 |
| 2019 | Walleye | fry | 100,000 | 0.8 |
| 2018 | Walleye | fry | 100,000 | 1.0 |
| 2017 | Walleye | fry | 100,000 | 0.9 |
| 2016 | Walleye | fry | 100,592 | 1.0 |
Field note · Minnesota stocks by year, not by truck day: walleye fry go in within weeks of ice-out, fingerlings and yearlings mostly in fall, and stream trout in spring and fall. A row here means the fish went in during that year; DNR adds the year's rows after the fact, so the current year can look empty until winter.
Public accesses
| Type | Owner | Where |
|---|---|---|
| earthen ramp | DOT | - Access was gained from Minnesota Department of Transportation land on the northwest corner of the lake. |
DNR fish survey, 2024
| Species | Gear | Catch per net | Total catch | Avg lb |
|---|---|---|---|---|
| Common carp | Standard trap nets | 91.67 | 550 | 0.09 |
| Black bullhead | Standard trap nets | 11.17 | 67 | 0.29 |
| Walleye | Standard trap nets | 3.17 | 19 | 1.29 |
| Yellow perch | Standard trap nets | 0.67 | 4 | 0.04 |
| White sucker | Standard trap nets | 0.67 | 4 | 0.16 |
| White crappie | Standard trap nets | 0.50 | 3 | 0.65 |
| QBS | Standard trap nets | 0.33 | 2 | 2.93 |
| Northern pike | Standard trap nets | 0.17 | 1 | 4.35 |
| Walleye | Standard gill nets | 60.00 | 60 | 0.53 |
| Common carp | Standard gill nets | 51.00 | 51 | 0.43 |
| White sucker | Standard gill nets | 8.00 | 8 | 0.16 |
| Black bullhead | Standard gill nets | 7.00 | 7 | 0.57 |
| Yellow perch | Standard gill nets | 1.00 | 1 | 0.07 |
Catch per net (CPUE) is the DNR survey's count per gill net or trap net set; higher means more of that species were sampled, not a fishing forecast. Top species per gear shown; where we have no verified common name for a DNR code, the code itself is shown.
Lannon is a shallow, winterkill-prone lake located one half mile south of Graceville in west-central Minnesota. US highway 75 divides it into east and west basins. The east basin, west basin and East Toqua Lake are connected through culverts. Fish movement occurs among the three basins and fish assemblages are similar. Lannon Lake can provide valuable spawning and nursery habitat for fish from East Toqua, especially northern pike during springs with sufficient water levels. No public boat ramp exists on Lannon Lake and access is limited to the public road rights-of-way. This 2024 standard survey was conducted to collect routine fish population data using a gill net and trap nets. These data can be compared to historical standard and targeted survey data from Lannon Lake. Low oxygen levels caused most gamefish to die in Lannon and East Toqua lakes during the winter of 2022-2023. Walleye fry were stocked into Lannon in 2023 and will continue to be stocked annually. Walleye, perch and crappies were stocked into East Toqua Lake. Walleyes were abundant in the 2024 survey from the stocked 2023 year class and averaged 10.5 inches. A few walleyes from 17 to 23 inches were also caught. Low numbers of northern pike, yellow perch and crappies were caught. Other species included high numbers of black bullheads and common carp, as well as low numbers of bigmouth buffalo, white suckers and quillback carpsuckers. Management activities for Lannon Lake include annual walleye fry stocking, winter dissolved oxygen monitoring and fishery surveys.
Minnesota DNR survey narrative, .
All Minnesota stockings · every Minnesota lake with a page · state CSV · this lake on DNR LakeFinder
Stocking rows, depths, accesses and survey figures are Minnesota DNR LakeFinder data as of 2026-09-02. Regulations, slot limits and special rules are on the DNR page linked above, not here.
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